Er zijn 5 Chinese formules beginnend met "E"
- Er Chen Tang (Two Cured Decoction) Two Cured Decoction (Er Chen Tang)
- Er Miao San (Two Marvel Decoction) Two Marvel Decoction (Er Miao San)
- Er Xian Tang (Two Immortal Decoction) Two Immortal Decoction (Er Xian Tang)
- Er Zhi Wan (Two Ultimate Pill) Two Ultimate Pill (Er Zhi Wan)
- e Jiao Ji Zi Huang Tang (Ass Hide Gelatin and Egg Yolk Decoction) Ass Hide Gelatin and Egg Yolk Decoction (e Jiao Ji Zi Huang Tang)